Physics, 04.01.2020 06:31, Mariela2699

Aball of mass 0.800 kg is carefully balanced on a shelf that is 3.00 m above the ground. what is its gravitational potential energy? a. 2.08j b. 20.4j c. 7.84j d. 25.5j

Answers: 3

Show answers

Answers

Potential energy is the mechanical energy associated with the location of a body within a force field (gravitational, electrostatic, etc.) or the existence of a force field inside a body (elastic energy)

The gravitational potential force is subject to the relationship

PE = mgh

Where,

m = mass

g = Gravitational Energy

h = Height

If our height is 3 meters, the mass is 0.8Kg and the earth has a gravitational acceleration of 9.8m / s, we will have to

PE = (9.8)(3)(0.8)

PE = 23.52J

The closest answer is D.

answered: Guest

answer: the correct answer is 1.

explanation: there are various process in which a radioactive nuclei decays:

1) alpha decay: in this process, a heavier nuclei decays into lighter nuclei by releasing alpha particle. the mass number is reduced by 4 units.

$_a^z\textrm{x}\rightarrow _{a-2}^{z-4}+_2^4\alpha$

2) electron capture: in this decay process, a parent nuclei absorbs an electron and gets converted into a neutron. simply, a proton and an electron combines together to form a neutron. mass number does not change in this process.

$_a^z\textrm{x}+_{-1}^0\textrm{e}\rightarrow _{z-1}^a\textrm{y}$

3) gamma ray emission: it is a decay process in which an unstable nuclei gives excess energy by a spontaneous electromagnetic process. this decay releases $\gamma -radiations$ . this process does not change the mass number.

$_a^z\textrm{x}^*\rightarrow _a^z\textrm{x}+_0^0\gamma$

4) positron emission: it is a type of decay process, in which a proton gets converted to neutron and an electron neutrino. this is also known as $\beta ^+$ -decay. in this the mass number remains same.

$_a^z\textrm{x}\rightarrow _{z-1}^a\textrm{y}+_{+1}^0e$

from the above information, we see that only alpha-decay is producing a change in the mass number of the nucleus.

answered: Guest

Distance covered, s = 8ft - 4ft = 4 ftinitial velocity, u = 34 ft/sthe acrobat is moving upwards and therefore, a = -g = -9.81 m/s^2 = 32.19 ft/s^2applying equation of motion; s = ut -1/2gt^2then,4 = 34t -1/2*32.19t^24 = 34t - 16.095t^2rearranging; -16.095t^2 + 34t - 4 = 0solving the quadratic equation; t = {-34 +/- sqrt [34^2 - 4(-16.)]}/2(-16.095) = 1.06 +/- 0.93 = 0.13 or 1.99the acrobat will take 0.13 seconds to be at 8 ft above the ground. additionally, once at the maximum height, the acrobat will move down and be at the same spot (that is height) after 1.99 seconds moving down.

Other questions on the subject: Physics

Physics, 21.06.2019 14:00, keltaylor

Hurry click the links to open the resources below. these resources will you complete the assignment. once you have created your file(s) and are ready to upload your assignment, click the add files button below and select each file from your desktop or network folder. upload each file separately. your work will not be submitted to your teacher until you click submit. documents lab report guide file upload accepted file types: .ppt, .pptx, .xls, .xlsx, .doc, .docx, .zip, .pdf, .accdb, .msg delete all add files

Answers: 2

continue

Physics, 22.06.2019 06:30, keidyhernandezm

Which features on mars point to the possibility of liquid water on the planet? impact craters with sharp rims volcanic cones with craters gullies and stream-like channels mountain ranges with faults

Answers: 1

continue

Physics, 22.06.2019 10:50, infinitexero1022

Two rigid transformations are used to map δhjk to δlmn. the first is a translation of vertex h to vertex l. what is the second transformation? a reflection across the line containing hk a rotation about point h a reflection across the line containing hj a rotation about point k

Answers: 1

continue

Physics, 22.06.2019 12:00, Emiann222

Under normal conditions, describe how increasing the temperatures effects the solubility of a typical salt

Answers: 1

continue

Do you know the correct answer?

Aball of mass 0.800 kg is carefully balanced on a shelf that is 3.00 m above the ground. what is its...